<!DOCTYPE html>
<html>
    <head>
        <script src="js/vue.js"></script>
        <style>
            div.circular{
                width: 100px;
                height: 100px;
                background: red;
                border-radius: 50%;
                margin-top: 20px;
                text-align: center;
                line-height: 100px;
                color: #fff;
            }

            .bounce-enter-active {
                animation: Amin 0.5s;
            }

            .bounce-leave-active {
                animation: Amin 0.5s reverse;
            }

            @keyframes Amin {
                0% { transform: scale(0); background: red; }
                20% { transform: scale(1); background: burlywood;}
                50% { transform: scale(1.5); background: blueviolet;}
                100% { transform: scale(1); background: burlywood;}
            }
        </style>
    </head>
    <body>
        <div id="app">
            <button @click="show=!show">使用@keyframes创建CSS动画</button>
            <transition name="bounce">
                <div class="circular" v-if="show">圆形</div>
            </transition>
        </div>
        <script>
            var vm = new Vue({
                el:'#app',
                data :{
                    show:true
                }
            });
        </script>
    </body>
</html>